Penetration Testing

In October 2021 I read an article from The Journal of CyberSecurity and Privacy titled:  “An Empirical Assessment of Endpoint Detection and Response Systems against Advanced Persistent Threats Attack Vectors” while writing an article about EDR/XDR solutions and how they have evolved the strategy for threat hunting over traditional methods.  You can read that article here.   I think now is a good time to revisit that research paper and describe what was uncovered. More specifically: what type of TTPs are still able to circumvent top of the line EDR solutions built by the world’s top vendors of security products? One reason for this revisit is because I saw an article by Recorded Future discussing the same paper and wanted to contribute my take on it. The full paper is available for download here: https://arxiv.org/pdf/2108.10422.pdf, and the published version is available by searching Google for the article title “An Empirical…

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The Details The Log4J vulnerability in the Java logging package maintained by Apache made headlines late last week. It was disclosed as a Zero Day bug which is easily exploitable, received a CVSS score of 10/10, and includes remote code execution (RCE) on the target host. Associated CVE-2021-44228 is available on the NIST NVD website which provides more information and references including the CISA advisory. The number of Log4J installations has been described as “hundreds of millions” and “countless”. Virtually all Log4J versions (<= 20.14.1 which was released in early March 2021) are vulnerable. The most recent version of Log4J is now version 20.16.0 since subsequent patched updates were released in quick succession on December 6th and December 13th of 2021. If you want to know whether a 3rd party application is vulnerable to re-assess your risk, review the Software Bill of Materials (SBOM), if one has been provided, it…

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Linux Dominates Performance-based Computing Market Share Linux may be less susceptible to cyber-attacks because Windows presents such an attactive target by holding the majority of the desktop marketshare. However, Linux servers dominate the global market in some powerful ways. According to industry reports, Linux OSs comprise 100% of all supercomputers, and over 95% of the top 1 million web servers are running Linux. Linux runs on 90% of all cloud infrastructure and dominates the mobile phone market with > 80% of market share. Embedded operating systems, and RTOS for IoT devices? Again, Linux is by far the most popular OS of choice. If you want more interesting facts about Linux’s market presence, you can Read Nick Galov’s revealing 2021 comprehensive summary of Linux market penetration. Knowing how to conduct a Security Audit of a Linux system and services is very important indeed.  This most often includes whitelisting required applications and…

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What is GVM and OpenVAS? WikiPedia does a really nice introduction to GVM so let jump start our understanding with that: OpenVAS is the scanner component of Greenbone Vulnerability Manager, a software framework of several services and tools offering vulnerability scanning and vulnerability management. All Greenbone Vulnerability Manager products are free software, and most components are licensed under the GNU General Public License. To understand the relationship between OpenVAS and GVM we should refer to the OpenVAS website, which does a good job explaining the relationship between OpenVAS and GVM: In 2019 the branding separation was completed. OpenVAS now represents the actual vulnerability scanner as it did originally and the “S” in “OpenVAS” now stands for “Scanner” rather than “System”. These changes are accompanied by an updated OpenVAS logo. The framework where OpenVAS is embedded is the Greenbone Vulnerability Management (GVM).OpenVAS released with GVM-10 receives numerous performance optimization to address…

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A new type of vulnerability has been disclosed by researchers at Cambridge University in the UK where Unicode Bidirectional Control Characters are used to change the way text appears in the IDE or text editor compared to how the compiler will interpret and compile the source code into an executable.  Proof of concept code has been released for virtually every language including C, C#, C++, Go, Java, Ruby, Python, JavaScript, Rust, and more. Here is a link to the original paper, a GitHub repository released by the authors that includes proof-of-concept code samples for virtually every popular language and the issued CVEs CVE-2021-42574 and CVE-2021-42694, both having severity score of 9.8 “Critical”. Unicode Bidirectional Control Characters are needed in Unicode because Unicode is meant as a super encoding standard which allows all languages (and even emojis) to be contained in a single encoding standard as opposed to say, ASCII which…

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These study notes are provided for students of CompTIA Pentest+ exam. If you notice any problems with the notes, please let me know via email (joseph@ripplesoftware.ca).   General Pentesting Engagement Scoping Information Gathering Vulnerability Scanning Exploitation Process Pentest Tools Exploit Specifics Post Exploit Communication Processes

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The LockPicking Lawyer on Youtube is a highly skilled locker picking professional. His videos sure to amaze and are a wealth of knowledge to pentesters looking for physical penetration testing attacks. However, not all of his videos attack the keyway with a set of picks. His videos that use other technology to bypass locks and security devices tell a very interesting tale about the state of the art of technology. I have included some of his videos with a brief description, all of which demonstrate different aspects of lock bypassing. In the first video, you see a new device on the market which is specially designed to take images of the inside of a Kwikset Smartkey keyway. The product is from a company called LockTech LTKSD, and costs about $350 USD. The implication is that this could be used to quickly build a physical key that can work with a…

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